review(Driver.OpcUaClient.Contracts): first review; fix TryResolve nullability + [Range] guards

First review at 7286d320. -001 (Medium): TryResolve session param -> ISession? matching the
null guard + out-contract doc. -003: [Range] on MaxDiscoveredNodes/MaxBrowseDepth, drop dead
[Display]. -002 (NamespaceMap pulls full SDK into a DTO project) Open. Surfaced cross-module:
the OpcUaClient.Browser serializer lacks JsonStringEnumConverter (enum-as-int bug).

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Contracts/OpcUaClientDriverOptions.cs

@@ -128,6 +128,7 @@ public sealed class OpcUaClientDriverOptions
     ///     written to the driver health surface; the partially-discovered tree is still
     ///     projected into the local address space.
     /// </summary>
+    [Range(1, int.MaxValue)]
     public int MaxDiscoveredNodes { get; init; } = 10_000;
 
     /// <summary>
@@ -135,6 +136,7 @@ public sealed class OpcUaClientDriverOptions
     ///     OPC UA information models, shallow enough that cyclic graphs can't spin the
     ///     browse forever.
     /// </summary>
+    [Range(1, int.MaxValue)]
     public int MaxBrowseDepth { get; init; } = 10;
 
     /// <summary>
@@ -171,7 +173,6 @@ public sealed class OpcUaClientDriverOptions
     ///     Timeout for the AdminUI Test Connect probe, in seconds. The AdminUI clamps to a
     ///     60s server-side maximum; this default is what the form pre-fills for new instances.
     /// </summary>
-    [Display(Name = "Probe timeout (seconds)", Description = "Connection test timeout. Default 15s.", GroupName = "Diagnostics")]
     [Range(1, 60)]
     public int ProbeTimeoutSeconds { get; init; } = 15;
 }